EP 2202011 A1 20100630 - MOLD FOR PRESS APPARATUS, AND OPEN-DRAWING METHOD
Title (en)
MOLD FOR PRESS APPARATUS, AND OPEN-DRAWING METHOD
Title (de)
FORM FÜR EINE PRESSVORRICHTUNG SOWIE PRESSENBEARBEITUNGSVERFAHREN UND OPEN-DRAWING-VERFAHREN
Title (fr)
MOULE POUR PRESSE ET PROCÉDÉ D'EMBOUTISSAGE OUVERT
Publication
Application
Priority
- JP 2008070464 W 20081111
- JP 2007310965 A 20071130
Abstract (en)
This aims to provide a press-apparatus mold capable of improving the yield of a blank while preventing wrinkles and cracks in a finished product, and an open-drawing method according to the press-apparatus mold. Within a range corresponding to the excess thickness portion (6) of a blank (4), the width of a punch (3) is gradually enlarged toward the end of the punch (3), thereby to curve boundaries (or the punch ridgelines (3d and 3e)) formed by the upper face (3a) and the side faces (3b and 3c) of the punch (3), toward the end of the punch (3) and to the widthwise outer sides of the punch (3). At the same time, the width of the recess (1a) of a die (1) is gradually enlarged toward the end of the recess (1a), thereby to curve a drawing profile (8) set by the punch (3) and the die (1), toward the ends of the punch (3) and the recess (1a) and to the widthwise outer sides of the punch (3) and the recess (1a).
IPC 8 full level
B21D 22/02 (2006.01); B21D 22/06 (2006.01); B21D 22/22 (2006.01); B21D 24/00 (2006.01); B21D 24/04 (2006.01)
CPC (source: EP US)
B21D 22/02 (2013.01 - EP US); B21D 22/06 (2013.01 - EP US); B21D 22/22 (2013.01 - EP US); B21D 24/04 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2202011 A1 20100630; EP 2202011 A4 20111005; EP 2202011 B1 20121031; CN 101873901 A 20101027; CN 101873901 B 20130116; JP 2009131878 A 20090618; JP 4386130 B2 20091216; US 2010201031 A1 20100812; US 8490455 B2 20130723; WO 2009069461 A1 20090604
DOCDB simple family (application)
EP 08855410 A 20081111; CN 200880117686 A 20081111; JP 2007310965 A 20071130; JP 2008070464 W 20081111; US 67859308 A 20081111